Fvsetal-punch



(No Model.) B

W. SNEE.

METAL PUNCH.

No. 378,341. Patented Feb. 21, 1888.

I ,WITNESSES lllnrrn rn'rns \VILLIAM SNEE, OF PITTSBURG, PENNSYLVANIA. v

METAL-PUNCH.

SPECIFICATION forming part of Letters Patent No. 378,341, dated February21,1888. Application filed December 2, 1887. Serial No. 256,760. (Nomodel.)

To aZZ whmn it may concern:

Be it known that 1, WILLIAM Suns, a citizen of the United States, and aresident of Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inMetaLPunches; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanyin g drawings, which form a part ofthis specification, and in which- Figure 1 is a side elevation ofmyimproved punch. Fig. 2 is a longitudinal sectional view of the same,showing a modified construction. Fig. 3 shows the punch as applied to aham iner, and Fig. at is a perspective view of a portion of a fislrbarthrough which theholcs have been punched. by my device.

Like letters of reference denote corresponding parts in all the figures.

The object of my invention is to produce a punch for punching holes inmetal and other material which shall accomplish a twofold re sult at asingle operatiou-viz., punch a hole in the metal or other materialsubjected to its action, and at the same time form a series of radialgrooves or depressions around the aperture formed by the punch, as isshown clearly in Fig. i of the drawings, in which I have represented aportion or" an ordinary fish-plate through which a hole has beenpunched, provided with these radiating serrations or indentations.

To this end my invention consists in the improved punch or punchingdevice, which will be hereinafter more fully described and claimed.

On the accompanying drawings, the letter A denotes the body or head ofthe punch, which has the usual tenon, B, for attaching it either to ahammer or to any ordinary punching-machine in the manner wellunderstood. The punch proper, which is of steel or similar suitablematerial, is shown at C, and consists in a round bar of suitabledimensions, accordin to the size of the aperture to be punched.

a n As will be seen from the drawings, this punch 0 projects downwardlyfrom the head or body A and is encircled by a series of teeth (shown atD) which are integral with the body A and form an annular shoulderencircling the punch O. The latter must of course be of such a length asto enable it to penetrate the plate to lye-punched before the series ofteeth D strike the surface of the same. In using this punch it is usedprecisely as any ordinary punch; but it will be seen that after the holehas been punched in the plate or other substance subjected to its actionthe annular se ries of teeth D, by striking against the surface of theplate, will form a series of radial serrations or indentations radiatingfrom the bolt hole. The object of these serrations is to form a bitingor binding surface for the washer, nut, or bolt-head, as the case maybe, and operate in conjunction with these devices to form an effectualnut-lock.

Instead of constructing the punch in a sin gle solid piece, as shown inFig. 1, it may be in two or more pieces, as shown in Fig. 2, withoutaffecting the spirit of my invention. In the last-named figure I haveshown the body A and tenon 13 provided with a central longitudinal bore,into which the punch proper, C, is inserted, and held in place by thebindingscrew E. This construction admits not only of the removal of thepunch proper after it shall have become worn, but by loosening thebinding-screw E the punch may be adjusted so as to project a greater orless distance below the serrations D, so as to adapt it to punch platesof different thicknesses.

Having thus described my invcntion,l claim and desire to secure byLetters Patent of the United States- 1. A mctal-punch consisting of abody, A, having a cutting part, G, at its lower end, the said part 0being encircled by a series of downwardly-projecting teeth, D,substantially as setforth.

2. The combination, with the tubular body A, provided with thedownwardly-projecting teeth or serrations D, of the removable andadjustable punch or cutter G, substantially as and for the purpose setforth.

3. The combination of the tubular parts A In testimony that I claim theforegoing as my 13, provided with an annular series of downown I havehereunto affixed my signature in wardly-projecting teeth, D, thecenteral punch presence of two witnesses.

0r cutter, (J, and the binding-screw E,whereby WILLIAM SNEE. 5 the samemay be adjusted within the body A Vitnesses: B, substantially as and forthe purpose shown LOUIS BAGGER,

and set forth.

AUGUST PETERSON.

